Metal-forming press.



C. R. BRYSON.

METAL FORMING PRESS.

APPLICATION IILBD APR.8, 1914.

1,1 30,254. Patented Mar. 2, 1915.

2 SHEETS-SHEET 1 warn-on ATTORNEY THE NORRIS PETERS CO.. PHOTO-LITHCL.WASHINGION. n. c

G. R. BRYSON.

METAL FORMING PRESS.

APPLICATION FILED APR.8,1914.

Patented M21112, 1915.

2 SHEETSSHEET 2 TEE STATES ATENT OFFICE.

METAL-FORMING PRESS.

Specification of Letters Patent.

Patented Mar. 2, 1915.

Application filed April 8, 1914. Serial No. 830,328.

To all whom it may concern Be it known that I, OrrARLEs It. BRYsoN, acitizen of the United States, residing at Pittsburgh, in the county ofAllegheny and State of Pennsylvania, have invented a certain new anduseful Improvement in Metal- Forming Presses, of which the following isa specification.

My invention, hereinafter disclosed, aims to overcome a certain wellknown defect now prevalent in the art of metal working, or moreparticularly to that special class or branch dealing with the formationof various shapes of metal by the aid of a forging press, hydraulic orotherwise. I

In the present well known methods of shaping the metal by pressurepractically all standard types utilize a stationary base positioneddirectly underneath and in the path of the reciprocally actuatedpresshead, which base carries the lowermost forming die.

The trouble now existing, and which I aim to'eliminate by thisinvention, is due to the fact that the forging, subsequent to receivingthe required number of impacts from the presshead, becomes tightlywedged owing to the natural spread of the metal, in the lower immovabledie member, necessitating additional mechanism, of variable andexpensive detail constructions, intended to overcome or minimize thisobjection. Additional power is required in order to operate theseauxiliary mechanisms, which naturally means added cost in the firstplace, and likewise greater expense of maintenance and operation.

As previously stated this invention is designed for the purpose ofeliminating the disadvantage of having the forging stick in the die, byproviding a simple mechanism that can easily be incorporated with any ofthe well known styles of metal shaping presses, and I intend toaccomplish this object by means of the construction shown in theaccompanying drawings and set forth in detail in the followingspecification, which involves one embodiment of my basic idea, but Ireserve the right to make any necessary alterations or amendmentsthereto that will conform in all respects to the original intention, andwhich will be within the scope of the appended claims.

My basic idea therefore consists in substituting a movable die carryingmember for the stationary die block at present in common usage, whichmovable die, for all practical purposes and general utility, I proposeto adequately mount for rotation beneath the vertically actuated andreciprocating presshead carrying the uppermost forming die.

In the drawing Figure 1 is an elevation of a common type of pressequipped with my invention: Fig. 2 shows an end elevation of the same:Fig. 3 is a cross section of the rotatable die carrying member involvinga plurality of bearing surfaces, the presshead being in working contactwith the forging, showing a portion of the bar already formed: Fig. 4:is a similar view showing the presshead away from engagement with theforging ready to finish its downward stroke and complete an additionalsegment of the bar, and Fig. 5 shows apartially completed bar inperspective.

The principal detail construction of my invention resides in a suitablerotary die carrying member, designated as a whole by the numeral 1,which said member is of a roll formation involving shaft portions and isadequately mounted directly underneath the vertical path of thereciprocating presshead 2, journals 3 being provided intermediate of theguide columns 4-, thereby properly supporting said rotary die member.The outer extremities or shaft portions of this movable die project apredetermined distance out from the guide columns, and have keyed, orotherwise secured thereto, pinions or gears 5, one at each side asshown. The central portion of this rotary die is provided with anenlarged diameter of a roll-like formation, which, at the approximatelongitudinal center, has one or more circumferential grooves 6, of anysuitable uniform depth and width, designed to receive and accommodatethe forging. The two side walls of this groove are made with apredetermined degree of taper, orin other words beveled, as shown inFig. 1.. The bottom surface of this groove 6 is dividedcircumferentially into a plurality of independent tangentially arrangedbearing surfaces 7, all of which may be identical insize.andconfiguration, or they may be varied in accordance with theshape of the forging intended to be produced. The uni form detail ofthese surfaces 7 is clearly shown in one instance in the crosssectional.

view Fig. 4. It will readily be understood that these die or bearing,surfaces .are ca;. pable of a multiplicity of modifications to suit thevarious forms of forging's intended tobe produced, but each roll 1 willhave its own individual die forming surfaces.

The bar 8 to be shaped is placed, or fed in any suitable manner, intothe groove 6,

saidba'r being retained and seated" on one s of the surfaces 7 in alevel or horizontal attitude, as shown; The first impact of thepresshead 2, carrying thetop die piece, will spread and elongate thebar, forming a seg- Inent thereof into the shape desired. f Said head'isthen raised from its'pressing attitude in the groove 6 clear of the rolldie 1,, thus permitting free unimpeded rotation lowing describedadditional mechanism:

Positioned at each end of the roll 1, adjacent, to the. rotary path ofthe pinions 5, and designed for reciprocal perpendicular movement, arethe operating bars 9, suitably housed by guides 10. The uppereX-tremities of each of these said bars is pro: vided with an i'n-turned orbent portion 11,fw1iich said bent portions are designed tobe engaged theguide collars 12, on the upward stroke of'the presshead, for the purposeof raising said bars. Each of these said bar members v 9 carries inritslower portion a gravity actuated pawl 13, of adequate size. andstrength, which engages in the teeth of the adjacent pinion5.

Fig. 1 illustrates the relative positions assumed bythe coactingelements when the presshead is lowered to..i ts limit of downwardmovement, with the forging pressed into shape. presshead rises clear ofcontact with the rotary pathof the roll die member-1, and, at apredetermined point on this ,upward stroke the guide collars 12 engagethe bent portions 11 and lift the. bars 9 simultaneously' a distancedetermined by the. limit of the upward 'strekel The instant said bars Onthe upward stroke the ready for the next downward stroke of thepresshead. j As said head descends the bars 9 also fall by gravity inunison with the .movement of the guide collars l2, during which actionthe pawls 13, being pivotally mounted in said bars, ride freely overthe.

pinions 5, and when the said bars 9 Teach their lowermost limit ofmovement said pawls will drop to a seat 14, and assume an approximatehorizontal attitude, ready to engage the pinions and rotate the die rollon the next succeeding upward stroke of i the presshjead, In thismannerasuccession of die surfaces arepresented to the action of theplunger presshead at every down-. ward stroke, with the exception that,owing to the normal distance intervening between the collars 12 and bentportion 11 ofthe bars .9, the pres'shead is capable ofbeing operated upand down, within a limited path, without affectinggor disturbing the Vpositionof the rotary die 1. A p

Directly underneath the center of the rotary die member is positioned afixed block 7 15, which is designed to assist in carrying the weight ofsaid roll 1, and take upthe v greater portion 'of the strain incidentalto the pressing action of the head 2. The'roll 1 seats directly on andcontacts with said block 15 during the said pressing operation,

but owing to the fact that said roll is obliged 7 to rotate, v thecontact between these two members 1 and 15 I is sufficiently relievedonkthe upward stroke of the head 2, by providing compression springs 16in the housings 3, which springs carry the weight of the roll, beingdepressed, when the head '2 isperforming its work, and expanding suf;

ficiently to permit clearance between the roll die and block when saidhead'is raised.

This vertical oscillating movement given to s the die roll by meansoffsaid springs' lfi' will be slight, not necessarily over one eighth ofan inch play, but adequate to permit rotation of said die rollwithout-interference from said block 15; p

I lVhatIfclaim as my invention isi I 1.; In combination with areciprocally actuatedpre'sshead, a forming member mounted for rotationin the path of the press head, said forming member involving a cir- 7cumferential groove having inclined-side walls, the bottom ofsaid groovebeing divided into aplurality of tangentially arranged working surfaces.

2. In combination with a reciprocallyac para las ed. mowe di ose r ingdie member mounted for intermittent rotation in the path of thepresshead, said sent in sequence said Working surfaces in rotatable diemember being provided with horizontal attitude. 1 .0 a circumferentialgroove having inclined In testimony whereof I aflix my signature sideWalls, the bottom of said groove being in the presence of: tWoWitnesses.

divided into a plurality of tangentially ar- CHARLES R. BRYSON. rangedWorking surfaces, and automatic Witnesses:

means for turning said die member during ISABEL MITCHELL,

the upward stroke of the presshead to pre- B. H. GIFFEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patenh, Washington, D. 0.

